<?xml version="1.0" encoding="UTF-8"?>
<!-- Copyright 2007 XBRL International. All Rights Reserved.   
 
This version is non-normative - it should be identical to the normative version that is contained in Appendix A of the relevant specification except for this comment.

Following the schema maintenance policy of XBRL International, it is the intent (but is not guaranteed) that the location of non-normative versions of these schemas on the web will be as follows:

1)      While any schema is the most current RECOMMENDED version and until it is superseded by any additional errata corrections a non-normative version will reside on the web in the directory http://www.xbrl.org/2008/ - during the drafting process for this specification this directory should contain a copy of the most recent published version of the schema at http://www.xbrl.org/2008/generic-reference.xsd.

2)      A non-normative version of each schema as corrected by any update to the RECOMMENDATION will be archived in perpetuity on the web in a directory that will contain a unique identification indicating the date of the update.

-->
<schema 
  targetNamespace="http://xbrl.org/2008/reference"
  elementFormDefault="qualified"
  xmlns="http://www.w3.org/2001/XMLSchema" 
  xmlns:reference="http://xbrl.org/2008/reference" 
  xmlns:link="http://www.xbrl.org/2003/linkbase" 
  xmlns:xl="http://www.xbrl.org/2003/XLink"
  xmlns:gen="http://xbrl.org/2008/generic" 
>
  <annotation>
    <appinfo>

      <link:roleType
        roleURI="http://www.xbrl.org/2008/role/reference"
        id="standard-reference">
        <link:usedOn>reference:reference</link:usedOn>
      </link:roleType>

      <link:arcroleType id="element-reference" 
            cyclesAllowed="undirected" 
            arcroleURI="http://xbrl.org/arcrole/2008/element-reference">
        <link:definition>element has reference</link:definition>
        <link:usedOn>gen:arc</link:usedOn>
      </link:arcroleType>

    </appinfo>
  </annotation>


  <import namespace="http://www.xbrl.org/2003/XLink"
    schemaLocation="http://www.xbrl.org/2003/xl-2003-12-31.xsd"/>

  <import namespace="http://www.xbrl.org/2003/linkbase"
    schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" />



  <element id="xml-generic-reference"
  name="reference" substitutionGroup="xl:resource">
    <complexType mixed="true">
      <complexContent mixed="true">
        <extension base="xl:resourceType">
          <sequence>
            <element ref="link:part" minOccurs="0" maxOccurs="unbounded"/>
          </sequence>
        </extension>
      </complexContent>
    </complexType>
  </element>

</schema>